Siting & Zoning

Point detector coverage

Point smoke detector

7.5 m maximum radial distance; about 10.6 m on a square grid.

Point heat detector

5.3 m maximum radial distance; about 7.5 m on a square grid.

Wall/obstruction clearance

Keep the sensing position at least 500 mm away where the clause applies.

Pitched ceiling allowance

Increase apex coverage by 1% per degree of slope, capped at 25%.

Beams, voids, honeycomb ceilings, high ceilings and air movement require separate assessment.

Detection zones

Single-zone floor area

Normally no more than 2,000 m².

Search distance

For non-addressable detection, keep the search route to 60 m or less.

More than one storey

Normally one storey per zone unless the building is small enough for the stated exception.

Manual call points

Mounting height

1.4 m to the centre of the operating face, with the permitted tolerance.

Travel distance

No more than 45 m along the route to the nearest call point.

Locations

Escape routes, storey exits, final exits and close to specific high fire hazards.